JPH11304252A - Heater with air cleaning function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress cost increase by providing a reflective electric stove for heating a room additionally with an ion wind type air cleaning function thermally sterilizing floating matters in the air using heat of the electric stove. SOLUTION: An ion wind type air cleaner 5 comprising an ion wind generating section 9 having a linear electrode 15 and counter electrodes 16, 17, and a dust collecting plate 10 attracting dust and bacterium in the charged air generated from the ion wind generating section 9 is disposed on the rear side of the reflector 4 in a reflective electric stove for heating a room. Contamination of the dust collecting plate 10 is prevented by raising the surface temperature thereof with radiation heat from an infrared heater 3 thereby thermally sterilizing bacterium adhering to the dust collecting plate 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating apparatus having an air purifying function, which has a heat sterilizing function by using radiant heat of an electric heater for heating a room.

[0002]

2. Description of the Related Art Conventionally, in Japanese Utility Model Publication No. Hei 6-22443, a heating wire having a large electric resistance is used as an ionizing wire, and floating substances in the air charged by the ionizing wire are collected on a dust collecting plate. At the same time, there has been proposed an air purifier with a heating function configured to perform heating and heat sterilization by heating air using heat generation caused by the flow of an electric current through an ionization line.

[0003]

However, in a conventional air purifier with a heating function, there is a temperature difference near an ionizing line which is a heating element, and air passing near the ionizing line does not have the same temperature. For this reason, bacteria adhering to suspended matter in the air may not be heat-sterilized but may be collected on the dust collecting plate, which causes a problem that the dust collecting plate is contaminated by the bacteria.

Further, since a heat-resistant and insulating material must be used around the ionizing wire, there is a problem that the number of parts increases and the product cost increases. By heating the air inhaled from the suction port near the ionization line, the suspended substances in the air are heat-sterilized, and the heated air is used for heating the room. The problem arises that it is not a general use of heat.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heating device with an air purifying function that can surely perform thermal sterilization of suspended substances in the air and can sufficiently heat the room. It is another object of the present invention to provide a heating device with an air purifying function that requires no countermeasure for both heat resistance and insulation and that can reduce product cost by reducing the number of parts.

[0006]

According to the first aspect of the present invention, the temperature of the dust collecting portion is maintained at a predetermined temperature or higher by heating the dust collecting portion with the heater for heating the room. Dripping. This makes it possible to reliably sterilize the bacteria that have been charged by the charging unit and adhered to the dust collection unit by heat, so that contamination of the dust collection unit can be prevented. Since the heat sterilization can be performed by using the surplus heat of the heater, it is not necessary to newly add a heater, and the cost is reduced.

According to the second aspect of the invention, when indoor air enters the ventilation path, the floating substances and bacteria in the air are charged, and the floating substances and bacteria in the charged air are collected in the dust collecting section. Dust is collected by adhering. According to the invention as set forth in claim 3, by setting the distance between the metal reflector and the dust collecting unit within a predetermined setting range, the temperature of the dust collecting unit is set to a predetermined temperature or more that can be heat sterilized. By keeping the dust collecting portion away from the reflector and raising the temperature, both heat resistance and insulation measures are not required, and the number of components can be reduced, so that the product cost can be reduced.

According to the fourth aspect of the present invention, depending on the voltage applied to the dust collecting plate, even if the distance between the reflecting plate and the dust collecting plate is within a predetermined set range, the reflecting plate and the dust collecting plate can be used. A spark discharge occurs between the two and increases ozone. Therefore, by painting the surface of the dust collecting plate on the side of the reflecting plate black to enhance the heat collecting effect of the dust collecting plate, the spark discharge between the reflecting plate and the dust collecting plate can be suppressed. Can be reduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Configuration of Embodiment] An embodiment of the present invention will be described based on an embodiment with reference to FIGS. FIG. 1 is a diagram showing a schematic configuration of a reflective electric stove with an air cleaning function.

A reflective electric stove 1 with an air purifying function of the present embodiment has a housing 2 forming an outer shell, a far-infrared heater 3 installed in the housing 2, and radiant heat (radiant heat) of the far-infrared heater 3. ), And an ion-air-type air purifier 5 installed behind the reflector 4.

The housing 2 is formed in a substantially rectangular parallelepiped shape, and has a plurality (four in this example) of leg portions 6 at a lower portion so as to be located at a predetermined height on the floor in the room. ing. Inside the housing 2, a heater installation portion 7 for guiding the heat generated by the far-infrared heater 3 to the front is provided on the front side of the reflection plate 4, and a ventilation passage 8 and the like are provided on the rear side of the reflection plate 4. Is formed.

The far-infrared heater 3 is equivalent to the heater of the present invention, and is formed in a round bar shape and contains a coil-shaped heating wire in a quartz tube or a heat-resistant glass ceramic tube. In parallel, heater installation part 7 of housing 2
And a heating element that generates heat when energized. When the far-infrared heater 3 is energized, the surface temperature (heater temperature) rises to about 400 ° C. here,
The far-infrared heater 3 switches between “ON” and “OFF” 2
Two changeover switches (not shown) are used to switch between a mode in which both are turned on, a mode in which only one is turned on, and a mode in which both are turned off.

The reflecting plate 4 corresponds to the partition member of the present invention, and is a component that partitions the heater installation portion 7 and the ventilation path 8 and reflects the radiant heat of the far-infrared heater 3 forward. The reflecting plate 4 uses a steel plate plated with stainless steel, chromium, or aluminum as its parabolic surface, and reflects the radiant heat from the far-infrared heater 3 installed near the focal point so as to concentrate forward. And the reflection plate 4
It has curved portions 11 and 12 having a substantially semicircular arc shape, and two far-infrared heaters 3 are respectively installed near the focal point.

The air purifier 5 includes the above-described ventilation path 8, a blowing section 9 for generating an ionic wind in the ventilation path 8,
An ion wind type air purifier provided with a dust collecting electrode plate (hereinafter abbreviated as a dust collecting plate) 10 to which airborne substances and bacteria charged in the blast unit 9 adhere. It is an air purifying means having both a dust collecting function of collecting substances and bacteria and a heat sterilizing function of heat sterilizing the collected bacteria.

The ventilation passage 8 is formed between a case (not shown) installed on the rear side of the housing 2 and the reflection plate 4. The ventilation path 8 has a suction port 13 for sucking contaminated air contaminated therein at a rear side of a lower end face of the housing 2 and a rear side of an upper end face of the housing 2.
It has an outlet 14 for blowing clean air purified from the inside into the room.

The wind blowing section 9 corresponds to the charging section of the present invention, and is a section for charging fine particles (dust and dust) and bacteria in the air (positive charge). The wind generator 9 is connected to a positive electrode (+) of a high voltage generating means (not shown) of, for example, 6.5 kV.
Electrode 15 electrically connected to the high-voltage generating means, and two linear electrodes 15 electrically connected to the negative electrode (−) side of the high-voltage generating means. It is composed of flat counter electrodes 16 and 17. In addition, some dust, dust, bacteria, etc. in the air charged to a positive charge adhere to the two counter electrodes 16 and 17.

The dust collecting plate 10 corresponds to the dust collecting portion of the present invention, and is, for example, a 250 mm × 115 mm flat conductive metal plate, and is electrically connected to the negative (−) side of the high voltage generating means. Have been. Further, the dust collecting plate 10 is heated at a temperature required for heat sterilization (for example, 60 ° C.) by the radiant heat of the far-infrared heater 3.
As described above, a predetermined gap (for example, 7.5 mm to 1 mm) is provided from the back side surface of the reflection plate 4 so that the surface temperature (dust collection plate temperature) increases.
0.0 mm).

When the operation switch (not shown) of the air cleaner 5 is turned on, the high voltage generating means applies a high voltage to the linear electrodes 15, two opposing electrodes 16, 17 and the dust collecting plate 10. (For example, 6.5 kV) is applied,
The air purifier 5 starts operating.

[Operation of the Embodiment] Next, the operation of the reflective electric stove 1 with an air purifying function of this embodiment will be briefly described with reference to FIGS.

When the operation switch of the air cleaner 5 is turned on, the linear electrode 15, the dust collecting plate 10 and the counter electrode 1 are turned on.
A potential difference occurs between 6 and 17. As a result, ionic wind (ascending airflow) is generated in the draft unit 9, and indoor air is sucked into the ventilation passage 8 from the suction port 13. Dust, dust, bacteria, and the like in the air sucked into the ventilation passage 8 are charged to a positive charge by the blast unit 9, and a part of the dust, dust, bacteria, and the like adheres to the opposed surfaces of the opposed electrodes 16 and 17. The remaining positively charged dust, dust, bacteria, and the like adhere to the surface of the dust collecting plate 10 or the surface of the aluminum foil, thereby collecting fine particles in the air.

At this time, when the switch of the reflection type electric stove 1 with the air cleaning function is switched to “ON”, the two far infrared heaters 3 are energized and the temperature rises. When these far-infrared heaters 3 are heated to a predetermined heater temperature (for example, 400 ° C.) or higher, the radiant heat directly radiated from the far-infrared heater 3 and the reflected heat reflected on the reflecting plate 4 directly hit the body. It is warmed.

When the interior of the room is being heated by the two far-infrared heaters 3, the back surface temperature of the reflector 4 heated by the radiant heat of the two far-infrared heaters 3 is, for example, 20.
The temperature of the dust collecting plate 10 is raised to 0 ° C. or more, and is set at a predetermined gap (for example, 7.5 mm to 10.0 mm) from the reflecting plate 4, and the surface temperature of the dust collecting plate 10 is higher than the temperature required for heat sterilization (eg, 60 ° C.) Temperature.

As a result, the bacteria attached to the dust collecting plate 10 are sterilized by heat, so that the bacteria do not propagate on the surface of the dust collecting plate 10. Thereafter, the air purified when passing through the ventilation passage 8 is blown into the room from the outlet 14, thereby purifying the room air.

[Effects of the Embodiment] As described above, the reflection type electric stove 1 with the air purifying function of the present embodiment heats the dust collecting plate 10 by the far-infrared heater 3 for heating the room, thereby collecting dust. The surface temperature of the plate 10 can be uniformly maintained at or above the heat sterilization required temperature (for example, 60 ° C.). As a result, the dust collecting plate 10
Since the bacteria attached to the dust collecting plate 10 can be surely sterilized by heat, contamination of the dust collecting plate 10 can be prevented. And since such a heat sterilization can be performed by utilizing the surplus heat of the far-infrared heater 3, there is no need to add a new heater, and the cost is reduced.

By setting the distance between the reflecting plate 4 and the dust collecting plate 10 to a setting range of 7.5 mm or more and 10.0 mm or less (7.5 mm in this example), the dust collecting plate 10 is moved to the reflecting plate. By raising the surface temperature of the dust collecting plate 10 while keeping it away from the back side of the device 4, both heat-resistant measures and insulation measures become unnecessary, and the number of parts can be reduced. Price can be reduced.

[Experimental Results of the Example] Next, by changing the distance between the reflector 4 and the dust collecting plate 10 variously, the surface temperature of the dust collecting plate 10 becomes the temperature required for heat sterilization (at least 50 ° C., desirably at least 50 ° C.). An experiment was conducted to investigate how the temperature changes with respect to (60 ° C.). In this experiment, the voltage applied by the high voltage means was set to 6.5 kV, and the surface area of the dust collecting plate 10 was set to 250 mm × 115 mm, and the results were measured. The measurement results are shown in the graph of FIG.

As is clear from the graph of FIG.
It can be seen that the closer the dust collecting plate 10 is to the rear side surface of the reflecting plate 4, the higher the surface temperature (dust collecting plate temperature) of the dust collecting plate 10 is. The measurement results show that the temperature required for heat sterilization is reached when the distance between the reflection plate 4 and the dust collection plate 10 is 7.5 mm or less.

Here, depending on the voltage applied to the dust collecting plate 10 (6.5 kV in this example), even if the distance between the reflecting plate 4 and the dust collecting plate 10 is within the set range (7.5 mm), Reflector 4
There is a possibility that a spark discharge occurs between the dust collection plate 10 and the dust collection plate 10. In this example, the distance between the reflecting plate 4 and the dust collecting plate 10 is 6 mm.
When the following conditions are satisfied, a discharge region in which a spark discharge occurs (FIG. 2)
Graph). Therefore, the desirable value of the distance between the reflection plate 4 and the dust collecting plate 10 is 6 mm or more and 10 mm or less when the heat sterilization required temperature is 50 ° C. or more, and when the heat sterilization required temperature is 60 ° C. or more. Is around 7.5 mm.

Further, even if the distance between the reflecting plate 4 and the dust collecting plate 10 is within the set range, if the voltage applied to the dust collecting plate 10 is large, the distance between the reflecting plate 4 and the dust collecting plate 10 is increased as described above. Since a spark discharge occurs between them, it is desirable to attach a black body to the surface of the dust collecting plate 10. Specifically, the surface of the dust collecting plate 10 is partially or entirely painted black.

Next, a description will be given of an experiment for investigating how the ratio of the black body on the surface of the dust collecting plate 10 is changed by variously changing the ratio. In this experiment, the voltage applied by the high voltage means was set to 6.5 kV, the distance between the reflecting plate 4 and the dust collecting plate 10 was set to 10 mm, and the surface area of the dust collecting plate 10 was set to 250 mm × 115 mm. The measurement results are shown in the graph of FIG.

As is clear from the graph of FIG.
It can be seen that the surface temperature of the dust collecting plate 10 (the temperature of the dust collecting plate) rises as the black body is attached to the surface of the dust collecting plate 10, that is, as the surface of the dust collecting plate 10 is blackened. In this example, the distance between the reflection plate 4 and the dust collection plate 10 is 10 m.
Even if it is set to m, if the ratio of the black body is 50% or more, the temperature required for heat sterilization (50 ° C.) is reached, and the ratio of the black body is 75%.
If it is above, it turns out that it reaches the temperature required for heat sterilization (60 ° C.).

Accordingly, the surface of the dust collecting plate 10 is partially or entirely painted black to enhance the heat collecting effect of the dust collecting plate 10, thereby increasing the distance between the reflecting plate 4 and the dust collecting plate 10. Since spark discharge can be suppressed, electric shock due to charging of a metal portion such as the housing 2 can be prevented, and ozone can be reduced.

[Modification] In this embodiment, an example in which the present invention is applied to the reflective electric stove 1 having an air purifying function has been described. However, the present invention is applied to a convective electric stove having an air purifying function provided with a blower. May be applied. In addition, as a heater, not only the far-infrared heater 3 but also a dust collector can be maintained at a predetermined temperature (heat sterilization required temperature) or higher, and an infrared heater, a nichrome wire heater, a hot water heater, a condenser of a refrigeration cycle ( A heating device (heater) such as a refrigerant condenser or a Peltier element may be used.

In this embodiment, an example in which a flat conductive metal plate is used as the dust collecting plate 10 has been described.
An aluminum foil (not shown) for adhering the remaining dust, dust, bacteria, etc. in the air charged to a positive charge is applied to the surface of the device, and a high voltage is applied to the aluminum foil or the dust collecting plate by high voltage means. You may do it. When the aluminum foil is wound around the dust collecting plate 10, the dust collecting plate 10
An electrically insulating material such as plastic (resin), stone, wood, or the like can be used as the material of.

By using the dust collecting plate 1 for a long time,
When a large amount of dust, dirt and bacteria adhere to the surface of the housing 0, the dust collecting plate 10 may be taken out of the housing 2 and the dust collecting plate 10 may be washed with water or the like. When the aluminum foil is wound, it is used for a long time, and when a large amount of dust, dirt and bacteria adhere to the aluminum foil, the air purifier 5 can be made like a new one by replacing only the aluminum foil. , Maintenance work becomes very simple.

When the dust collecting plate 10 is dropped to the ground, the reflecting plate 4 may be replaced with the dust collecting plate 10, or the dust collecting plate 10 may be directly attached to the back side of the reflecting plate 4. Further, the two opposing electrodes 16 and 17 of the blast unit 9 may be heated to a temperature higher than the heat sterilization temperature by the heater. In addition, the present invention may be applied to a wall-mounted electric stove as well as a floor-mounted electric stove.

In this embodiment, when heating the room by operating a heater (heater) such as the far-infrared heater 3,
The operation switch of the air purifier 5 is pressed to perform the heat sterilization. However, when only the air purifier 5 is used, the heat sterilization cannot be performed. The bacteria can be heat-sterilized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a reflective electric stove with an air cleaning function (Example).

FIG. 2 is a graph showing a relationship between a distance between a reflection plate and a dust collecting plate and a temperature of the dust collecting plate (Example).

FIG. 3 is a graph showing a relationship between a ratio of a black body and a dust collecting plate temperature (Example).

[Explanation of symbols]

REFERENCE SIGNS LIST 1 reflective electric stove with air purifying function (heating device with air purifying function) 3 far-infrared heater (heater) 4 reflective plate (partition member) 5 air purifier 7 heater installation part 8 ventilation path 9 blast part (charging part) DESCRIPTION OF SYMBOLS 10 Dust collection plate (dust collection part) 15 Linear electrode 16 Counter electrode 17 Counter electrode

Claims (4)

[Claims] (A) a charging section for charging floating substances and bacteria in the air; (b) a dust collecting section to which floating substances and bacteria in the air charged by the charging section adhere; and (c) A heating device with an air purifying function, comprising: a heater for heating the interior of the room while heating the dust collecting portion to a predetermined temperature or higher that can be thermally sterilized. 2. The heating device with an air purifying function according to claim 1, wherein a ventilation path for guiding indoor air to the charging section and the dust collecting section, and a heater for guiding heat generated by the heater forward. And a partition member for partitioning the ventilation path and the heater installation section. 3. The heating device with an air purifying function according to claim 2, wherein the partition member is a metal reflecting plate for reflecting the radiant heat of the heater forward, and A heating device with an air purifying function, wherein a distance of the heating device is set within a predetermined setting range. 4. The heating device with an air purifying function according to claim 3, wherein the dust collecting portion is a dust collecting plate having a surface on the reflection plate side painted black. apparatus.